/* roulang page: index */
:root {
            --bg-deep: #0A0E17;
            --cyber-cyan: #00F0FF;
            --electro-pink: #FF3CAC;
            --card-bg: rgba(20,26,38,0.8);
            --card-border: rgba(0,240,255,0.2);
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C5;
            --text-dark: #0A0E17;
            --radius-card: 12px;
            --radius-btn: 6px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 20px rgba(0,0,0,0.6);
            --shadow-glow: 0 8px 40px rgba(0,240,255,0.15);
            --grid-line: rgba(0,240,255,0.03);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1.2);
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            background-image: 
                linear-gradient(var(--grid-line) 1px, transparent 1px),
                linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
            background-size: 80px 80px;
            background-position: center center;
            background-attachment: fixed;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        a {
            color: var(--cyber-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--electro-pink);
            text-decoration: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, .button {
            cursor: pointer;
            font-family: inherit;
            border-radius: var(--radius-btn);
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            transition: all var(--transition-smooth);
            border: none;
            display: inline-block;
            text-align: center;
            padding: 12px 28px;
            background: transparent;
            color: var(--text-primary);
        }

        .button-primary {
            background: var(--cyber-cyan);
            color: var(--text-dark);
            box-shadow: 0 0 15px rgba(0,240,255,0.3);
            border: 2px solid var(--cyber-cyan);
        }

        .button-primary:hover {
            background: #00D4E0;
            box-shadow: 0 0 30px rgba(0,240,255,0.6);
            color: var(--text-dark);
            border-color: #00D4E0;
        }

        .button-secondary {
            background: transparent;
            border: 2px solid var(--cyber-cyan);
            color: var(--cyber-cyan);
        }

        .button-secondary:hover {
            background: rgba(0,240,255,0.1);
            border-color: var(--electro-pink);
            color: var(--electro-pink);
        }

        .button-pink {
            background: var(--electro-pink);
            color: white;
            border: 2px solid var(--electro-pink);
        }

        .button-pink:hover {
            background: #ff1a8c;
            box-shadow: 0 0 20px rgba(255,60,172,0.5);
            border-color: #ff1a8c;
        }

        h1, h2, h3, h4 {
            font-weight: 800;
            letter-spacing: 2px;
            color: var(--text-primary);
            margin-top: 0;
        }

        h1 {
            font-size: 3rem;
            background: linear-gradient(135deg, var(--cyber-cyan) 0%, #00C8D6 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        h2 {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
        }

        h2::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -8px;
            width: 60px;
            height: 4px;
            background: var(--electro-pink);
            border-radius: 2px;
        }

        .section-title-center h2::after {
            left: 50%;
            transform: translateX(-50%);
        }

        .section-title-center {
            text-align: center;
        }

        /* 导航胶囊 */
        #main-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            background: rgba(10,14,23,0.85);
            backdrop-filter: blur(20px);
            border-radius: var(--radius-pill);
            padding: 8px 24px;
            border: 1px solid var(--cyber-cyan);
            width: auto;
            max-width: 95%;
            box-shadow: 0 10px 30px rgba(0,0,0,0.7);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }

        .logo-text {
            font-weight: 800;
            font-size: 1.5rem;
            background: linear-gradient(45deg, var(--electro-pink), var(--cyber-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 2px;
            white-space: nowrap;
            margin-right: 30px;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links a {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 8px 12px;
            border-radius: 20px;
            transition: all var(--transition-fast);
            position: relative;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--electro-pink);
            transform: scaleX(0);
            transition: transform var(--transition-fast);
        }

        .nav-links a:hover {
            color: var(--cyber-cyan);
        }

        .nav-links a:hover::after {
            transform: scaleX(1);
        }

        .burger-icon {
            display: none;
            font-size: 2rem;
            color: var(--cyber-cyan);
            cursor: pointer;
            line-height: 1;
        }

        /* Hero */
        #hero {
            padding: 180px 0 120px;
            position: relative;
            background: radial-gradient(ellipse at 30% 50%, rgba(0,240,255,0.15) 0%, transparent 60%),
                        radial-gradient(ellipse at 70% 30%, rgba(255,60,172,0.1) 0%, transparent 50%);
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 60px;
        }

        .hero-text {
            flex: 1;
        }

        .hero-visual {
            flex: 1;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-radius: 24px;
            height: 400px;
            box-shadow: 0 0 60px rgba(0,240,255,0.2);
            border: 1px solid rgba(0,240,255,0.3);
            position: relative;
            overflow: hidden;
        }

        .hero-visual::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10,14,23,0.4);
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        /* 通用板块 */
        section {
            padding: 100px 0;
            border-bottom: 1px solid rgba(0,240,255,0.08);
        }

        .card {
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-card);
            border: 1px solid var(--card-border);
            padding: 28px;
            transition: all var(--transition-smooth);
            box-shadow: var(--shadow-card);
            height: 100%;
        }

        .card:hover {
            border-color: rgba(0,240,255,0.6);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        /* 优势卡片左侧竖线 */
        .advantage-card {
            border-left: 3px solid var(--cyber-cyan);
            padding-left: 24px;
        }

        .advantage-card:hover {
            border-left-color: var(--electro-pink);
        }

        /* 功能卡片横向 */
        .feature-horizontal {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .feature-icon {
            width: 50px;
            height: 50px;
            background: var(--cyber-cyan);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--bg-deep);
            flex-shrink: 0;
        }

        /* 场景卡片 */
        .scenario-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 16px;
        }

        .tag {
            background: rgba(0,240,255,0.15);
            color: var(--cyber-cyan);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            display: inline-block;
            margin-right: 8px;
        }

        /* 数据跑马灯 */
        .marquee-wrap {
            background: rgba(20,26,38,0.9);
            padding: 20px 0;
            border-radius: 12px;
            margin-top: 40px;
            overflow: hidden;
            white-space: nowrap;
            border: 1px solid var(--card-border);
        }

        .marquee-content {
            display: inline-block;
            animation: marquee 20s linear infinite;
            color: var(--text-primary);
            font-weight: 700;
        }

        .marquee-content span {
            margin: 0 30px;
            color: var(--electro-pink);
            font-family: 'DIN Alternate', 'Inter', sans-serif;
        }

        @keyframes marquee {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* 价格卡片高亮 */
        .pricing-highlight {
            border: 2px solid var(--cyber-cyan);
            box-shadow: 0 0 30px rgba(0,240,255,0.2);
            transform: scale(1.03);
            position: relative;
        }

        .popular-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--electro-pink);
            color: white;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 800;
        }

        /* FAQ */
        .accordion-title {
            background: rgba(20,26,38,0.7);
            border-left: 4px solid var(--cyber-cyan);
            padding: 16px 24px;
            font-weight: 700;
            transition: 0.3s;
        }

        .accordion-item.is-active .accordion-title {
            border-left-color: var(--electro-pink);
            background: rgba(30,36,48,0.9);
        }

        .accordion-content {
            background: rgba(20,26,38,0.5);
            padding: 20px 24px;
        }

        /* CTA 深色底 */
        #cta {
            background: #05080F;
            background-image: radial-gradient(circle at center, rgba(0,240,255,0.1) 0%, transparent 70%);
            text-align: center;
            padding: 100px 0;
        }

        /* 页脚 */
        #footer {
            background: #0A0E17;
            border-top: 1px solid var(--cyber-cyan);
            padding: 60px 0 30px;
        }

        .footer-links a {
            display: block;
            margin-bottom: 8px;
            color: #B0B8C5;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                flex-direction: column;
            }
            .hero-visual {
                height: 300px;
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            #main-nav {
                width: 95%;
            }
            .nav-links {
                display: none;
            }
            .burger-icon {
                display: block;
            }
            .mobile-menu-open .nav-links {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(10,14,23,0.95);
                border-radius: 24px;
                padding: 20px;
                border: 1px solid var(--cyber-cyan);
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.8rem;
            }
            section {
                padding: 60px 0;
            }
        }